@Adenjii, as I understand it it will be a feature of the phone, the ability to self-charge by harvesting electricity from the WiFi. It would work automatically whenever the phone connects to a wireless network. Sounds very cool right? Stay tuned, we are planning to write something about this soon.

Earlier this week, I was speaking with an IEEE engineer and he mentioned that some engineers are working on buidling components that could literally harvest electricity from a WiFi signal. That would mean that cellular phones, for example, might be able to go weeks between charges and smaller devices that draw less power could conceivably never have to be charged. I think there's some interesting stuff coming down the pike that we can barely imagine.

"I was not thinking on the lines of "turbibe", but about the heat generated by the friction of the water flow thorugh the pipes - potentially that could be converted to some kind of energy"

Prabhakar, energies are formed at various instances and occasions, due to many activities like walking, driving the automobiles, by flow of water etc. but as of now there is not any proper mechanism to harvest such energies.

"There's one more possible source that is truly ubiquitous but has been hard to capture: static electricity due to friction (it often appears as ESD -- electrostatic discharge -- and is considered a bad thing). But some recent work at the Georgia Institute of Technology may change that."

Bill, that's great news but how far it's possible to generate, collect and distribute this frictional energies? How about its amplitude, frequency and volts for domestic use.

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